We're dividing 21570079 by 684 
Let's see how many times 684 fits into 21570079.

Moving on to step 1:
684 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 684

Going ahead to step 2:
The number 684 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 684

Let's proceed to step 3:
215 divided by 684 is 0 with a remainder of 215.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 215 to get 215.
Bring next digit (7) of the dividend behind the 215 and repeat the process: 2157 / 684

On to step 4:
2157 divided by 684 is 3 with a remainder of 105.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 2052 from 2157, we get 105.
Include the next digit (0) from the dividend after 105, then repeat: 1050 / 684

Going ahead to step 5:
The number 684 fits into 1050 1 times, leaving a remainder of 366.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Subtract 684 from 1050 to get 366.
Grab the next digit (0) from the dividend, add it to 366, then carry on: 3660 / 684

On to step 6:
684 goes into 3660 5 times with a remainder of 240.
Record the quotient 5 as the next digit in the result. 
Result so far: 315.0
Subtract 3420 from 3660 to get 240.
Grab the next digit (7) from the dividend, add it to 240, then carry on: 2407 / 684

Moving on to step 7:
The number 684 fits into 2407 3 times, leaving a remainder of 355.
The number 3 becomes the next digit in our result. 
Result so far: 3153.0
Deduct 2052 from 2407 and we're left with 355.
Grab the next digit (9) from the dividend, add it to 355, then carry on: 3559 / 684

Let's proceed to step 8:
3559 divided by 684 is 5 with a remainder of 139.
The next digit of our result is 5. 
Result so far: 31535.0
Subtract 3420 from 3559 to get 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

On to step 9:
1390 divided by 684 is 2 with a remainder of 22.
The next digit of our result is 2. 
Result so far: 31535.2
Deduct 1368 from 1390 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 10:
220 divided by 684 is 0 with a remainder of 220.
Record the quotient 0 as the next digit in the result. 
Result so far: 31535.2
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Moving on to step 11:
684 goes into 2200 3 times with a remainder of 148.
The number 3 becomes the next digit in our result. 
Result so far: 31535.203
If we take 2052 away from 2200, we end up with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

On to step 12:
The number 684 fits into 1480 2 times, leaving a remainder of 112.
Write down 2 as next digit of the result. 
Result so far: 31535.2032
Deduct 1368 from 1480 and we're left with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Let's proceed to step 13:
When dividing 1120 by 684, we get 1 with a remainder of 436.
The number 1 becomes the next digit in our result. 
Result so far: 31535.20321
Subtract 684 from 1120 to get 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Advancing to step 14:
684 goes into 4360 6 times with a remainder of 256.
Write down 6 as next digit of the result. 
Result so far: 31535.203216
Subtracting 4104 from 4360 leaves us with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

On to step 15:
When dividing 2560 by 684, we get 3 with a remainder of 508.
Record the quotient 3 as the next digit in the result. 
Result so far: 31535.2032163
The remainder is 508 after subtracting 2052 from 2560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Going ahead to step 16:
684 can be fit into 5080 7 times, resulting in a remainder of 292.
Use 7 as the next digit of our solution. 
Result so far: 31535.20321637
Subtracting 4788 from 5080 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

The final outcome is 31535.20321637, with a leftover of 2.92e-07.